package com.tool.app.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @Author xiaogao
 * @Date 2022/5/6 21:22
 * @Version 1.0
 * @Description 异步线程池配置
 */
@EnableAsync
@Configuration
public class AsyncExecutorConfig {


    @Bean("taskExecutor")
    public Executor taskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //配置核心线程数
        executor.setCorePoolSize(3);
        //配置最大线程数
        executor.setMaxPoolSize(6);
        //配置队列大小
        executor.setQueueCapacity(300);
        //配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix("taskThead");
        executor.setWaitForTasksToCompleteOnShutdown(true);
        // 设置线程池中任务的等待时间，如果超过这个时候还没有销毁就强制销毁，以确保应用最后能够被关闭，而不是阻塞住。
        executor.setAwaitTerminationSeconds(180);
        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //执行初始化
        executor.initialize();
        return executor;
    }

}
